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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07eb8f422059e5dbdb01fc1d04139f27b6b76cd6ea098cff4d6c330f48dca558' 
  AND token = 'uteEQlQ9N4N4s5UGhVSwZWG76ueoX1j3h0Uu6T4EBDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}